Clipper construction



April 27 1926. 1,582,321

L. J. WAHL CLIPPER CONSTRUCTION Filed Oct. 16, 1925 Patented Apr.- 2 7, 1926. I

UNITED STATES- PATENT OFFICE.

LEO J. WAHL, or STERLING, ILLINOIS, AssIGNoR ,cro WAHL CLIPPER CORPORATION,

OF STERLING; ILLINOIS, A

CORPORATION OF ILLINOIS.

cLIPRRR CONSTRUCTION.

' Application filed October 16, 1925. Serial No. 62,807.

To all whom it may con-cm:

Be it known that I, LEO J. WAHL, a citizen of the United Statea'residing at'Sterling, in the county of VVhiteside and State of I of the teeth of the blade corresponding to the side of the movable member or vibratory member fac ng the electro-magnet and by the sidefacmg .away from the electro-mag- I lllinois,- have invented a certain 'new and .net the opposite Side of each of the teeth is useful Improvement in Clipper Construction, of whichthe following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification. v My invention relates to a clipper construction and more particularly to the. blade eon- -struction of a clipper. l

It is a purpose of my invention to provide a clipper construction adaptedparticularly for electromagnetically operated glippers such that the clipper will not be stalled when the blades enter heavy hair or encounter a similar obstruction that increases the resistance to the cuttingv action.

It has been found that with .a clipper comprisinga vibratory member upon which the movable blade is'mounted which iscaused to be vibrated by anelectro-magnet, the teeth on one of the blades can be so formed as to automatically draw the vibratory member (into a position closer. to the electro-magnet whereby the armature forming a portion of a the vibratory member is attracted to the core 'of the electro-magnet with greater power when said; teeth encounter heavy hair or other resistance to the cutting action. This can be accomplished in two ways. Either the movable bladecan be pro'videdwith the edges or sides of the teeth facing away from the electro-magnet extending at an angle that approaches more nearly a direction transversely of the direction of the movement of the movable blade than that of the other side or edge of each of the teeth, or the same efiect is produced by making the sides of the teeth facing toward, the electromagnet of the stationary blade cooperating with said movable blade inclined at an angle that is more nearly transverse to the direction of movement of the movable blade than the side of each of the teeth facing away from said electro-magnet. In referring tothe sides facing toward andaway from the electro-magnet, it is'meant by the side facing toward the electro-magnet that side of each meant.

Other objects and advantages of the'in tion with a portion of the cover broken away;

Fig. 2 is partly broken away of the forward portion of the clipper;

3 is a fragmentary view of the movable clipper blade shown" in Fig. 2 greatly enlarged; and I 3 Fig. 4 is a similar fragmentary view of the stationary and movable blades showing a different form of the invention.

Referring in detail to the drawings, my improved clipper comprises a casing 5 upon which is mounted a stationary toothed clipper blade 6 and within which is'moun'ted an electro-magnet comprising a coil '7 and a core 8 which core is provided with end extensions 9 by the means of which the electro-magnet is secured to the casing by the securing members 10. A vibratory mem:

The blade .6 is provided with teeth 17 which cooperate. with the teeth 18 on the an,enlarged fragmentary view blade 14. The teeth 17 aresymmetrical' about an axis extending from the apex 19 thereofthrough the center of each tooth. That is, the side faces 20 and 21 thereof are inclined at substantially the same angle relative to said axis. The teeth 18, however, are provided with inclined sides 22 and 23 that are inclined at different angles to the central axis 24 of each of the teeth, the sides 22 being inclined at a. greater angle to said axis than the sides 23. Thus thesides 23 of the teeth 18 are arranged more nearly in a direction transverse to the direction of move ment of the blade 14 during its reciprocation than the sides 22 and the resistance to the movement thereof byhair entering between the teeth 18 which 'will be greater when the movement is in the direction that the faces 23 are forward than when the movement is in the direction that the faces 22 are forward. In other words, when the armature 12 is moving toward the core 8, the resistance to the movement will be less than when it is moving away from the core. Accordingly, when exceptionally thick hair is encountered which increases the resistance to the cutting action, the blade 14 will tend to assume a position further to the side of the clipper shown at the top of Fig. 1 than it would otherwise occupy thus bringing the armature 17 closer to the core 8 of the electroanagnet and causing an increase in the pull exerted by the electro-magnet thereon which tends to counterbalance the retardation due to the encountering of the thick hair, thus preventing the stalling of the clipper because of excessive resistance to the cutting action thereof.

Instead of using the arrangement described above, the construction shown in Fig. 4 can be used in which the stationary clip-per blade is indicated by the numeral 6 and the movable clipper blade by the numeral 14, the teeth of the stationary blade being indicated by the numeral 17 and the teeth of the moveable blade by the numeral 18. In this case the sides 25 and 26 of the teeth 18 on the movable blade 14' are inclined at the same angle to the central longitudinal axis 27 of the teeth 18'. The sides of the teeth 17 are in this case unsymmet rically arranged relative to the longitudinal center line 28 of said teeth, the sides 29 thereof being inclined at a smaller angle to said axis or center line 28 than the sides 80. the sides 29 lying on the sides of the teeth 17 corresponding to the side of the armature 12 nearest the clectro-m'agnet.

This arrangement produces the same effect as that shown in Figs. 2 and 3 as the resistance to the cutting action will be the greatest when the lade'14 moves so that the shearing action is between the edges 29 and 26 or whenthe armature 12 is moving away from the core 8. As a result, the armature 12 will tend to assume a position nearer the electro-magnet thus increasing the magnetic pull thereon and again preventing stalling in the manner described above.

Having thus described my invention what I desire to claim and secure by United States Letters Patent is:

1." In a clipper; a stationary toothed blade, a movable toothed blade, a. vibratory member, and an electro-magnet for vibrating said member, the teeth on one of said blades being formed so as to draw said vibratory member toward said electro-magnet during vibration thereof when increased resistance to cutting action is encountered.

2. In a clipper,.a stationary blade provided with teeth a movable blade mounted for reciprocation transversely of said stationary blade and provided with teeth cooperating with said first mentioned teeth, the teeth on one of said blades being unsymmetrical.

3. In a clipper, a stationary blade provided with teeth, a movable blade mounted for reciprocation transversely of said stationary blade and provided with teeth cooperating with said first mentioned teeth,

the teeth on one of said blades having one of the sides thereof extending at a greater angle to the direction of movement of said movable blade than the other side thereof.

4. In a clip-per, a stationary blade provided with teeth, a. movable blade mounted for reciprocation transversely of said stationary blade and provided with teeth cooperating with said first mentioned teeth, the teethon said movable blade being unsymmetrical.

5. In a clipper,' a stationary blade provided with teeth, a movable blade mounted for reciprocation transversely of said sta-" tionary blade and provided with teeth cooperating with said first mentioned teeth, the teeth on said stationary blade being un symmetrical. a

6. In a clip-per, a stationary blade provided with teeth, a movable blade mounted for reciprocation transversely of said stationary blade and provided with teethcooperating with said first mentioned teeth, the teeth on said movable blade having one of the sides thereof extending at a greater angle to the direction of movement of said movable blade than the other side'thereof.

7. In a clip er, a stationary blade provided wth teet a movable blade mounted for reciprocation transversely of said stationary blade and provided with teeth cooperating with said first mentioned teeth, the teeth on said stationary blade having one of the sides thereof extending at a greater angle to the direction of movement of said movable blade than the other side thereof.

8. Iii a clipper, a vibratory member, an electro-magnet for vibrating said member, a toothed movable blade on said vibratory member and a stationary toothed blade co- 0 eratin therewith, the teeth on said mova 'le blade having the sides thereof facing away from the said electro-magnet inclined at a greater angle to the CllleclllOllOf movement of said blade than the opposite sides thereof.

9. In a clipper, a vibratory member, an electro-magnet for vibrating said member,

10 a toothed movable blade on said vibratory member and a stationary toothed blade 00- operating therewith, the teeth on said stationary blade having the sides thereof facing away from the said electro-magnet inclined at a smaller angle to the direction of movement of said movablerblade than the opposite sides thereof.

In witness whereof, I hereunto subscribe my name this .1st day of October A. D., 1925.

LEO J. WAHL. 

